| 摘要 |
A float-type flowmeter and method for measuring the flow of fluids, incorporates a measuring tube through which measuring tube the fluid can flow against the force of gravity and which is provided with a float capable of moving at least in the direction of the flow, and an acquisition unit capable of tracking the movement of the float, with a motion signal corresponding to the movement of the float being transmissible to a diagnostic unit in which diagnostic unit an oscillation signal corresponding to the oscillation amplitude of the float can be derived from the motion signal and an error or alarm signal can be generated when, for a predefined length of time, the oscillation signal falls below a minimum setpoint value. To permit a prediction of the future progression of the condition of the float-type flowmeter, the flowmeter provides the capability to feed the motion signal corresponding to the movement of the float to a predictive evaluation unit, to compare the motion signal in the predictive evaluation unit with the values anticipated for the movement of the float as a function of the lift of the float, and, on the basis of deviations of the motion signal from the anticipated values, to cause the predictive evaluation unit to generate and output data on the current state of the float-type flowmeter as well as on the probable, expected future condition of the float-type flowmeter.
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